PS-2020a / part17
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DICOM PS3.17 2020a - Explanatory Information |
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Page 801 |
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Attribute |
Selector AttributeSelector Selector Sequence Selector |
Constraint |
Constraint Value |
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Value |
Pointer |
Sequence |
Type |
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Number |
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Pointer |
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Items |
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Content Qualification |
|
(0018,9004) |
1 |
(0018,9934) |
3 |
EQUAL |
PRODUCT |
Requested Series |
|
(0018,9937) |
1 |
(0018,9934) |
3 |
EQUAL |
"Raw Data Brain" |
Description |
|
|
|
|
|
|
|
Acquisition Type |
|
(0018,9302) |
1 |
(0018,9920) |
3 |
EQUAL |
SPIRAL |
Revolution Time |
|
(0018,9305) |
1 |
(0018,9920) |
3 |
EQUAL |
0.75 |
Single Collimation Width |
(0018,9306) |
1 |
(0018,9920) |
3 |
EQUAL |
0.5 |
|
Total Collimation Width |
|
(0018,9307) |
1 |
(0018,9920) |
3 |
EQUAL |
16 |
Table Speed |
|
(0018,9309) |
1 |
(0018,9920) |
3 |
EQUAL |
14 |
TableSpeedperRotation |
(0018,9310) |
1 |
(0018,9920) |
3 |
EQUAL |
10.5 |
|
Spiral Pitch Factor |
|
(0018,9311) |
1 |
(0018,9920) |
3 |
EQUAL |
0.656 |
CTDIvol |
|
(0018,9345) |
1 |
(0018,9920) |
3 |
EQUAL |
55.7 |
CTDI Phantom Type |
|
(0018,9346) |
1 |
(0018,9920) |
3 |
EQUAL |
(113690,DCM,"IEC |
Code Sequence |
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Head Dosimetry |
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Phantom") |
CTDIvol Notification |
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(0018,9942) |
1 |
(0018,9920) |
3 |
EQUAL |
80 |
Trigger |
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Acquisition Motion |
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(0018,9930) |
1 |
(0018,9920) |
3 |
EQUAL |
FORWARD |
>Acquisition Start Location Sequence (0018,9931) |
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ReferenceLocationLabel |
(0018,9900) |
1 |
(0018,9920), |
3\1 |
EQUAL |
"C1 Lamina" |
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(0018,9931) |
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Reference Basis Code |
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(0018,9902) |
1 |
(0018,9920), |
3\1 |
EQUAL |
(14806007, SCT, |
Sequence |
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(0018,9931) |
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"C1 vertebra") |
Reference Geometry |
|
(0018,9903) |
1 |
(0018,9920), |
3\1 |
EQUAL |
(128120, DCM, |
Code Sequence |
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(0018,9931) |
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"Plane through |
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Superior Extent") |
>Acquisition End Location Sequence (0018,9932) |
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ReferenceLocationLabel |
(0018,9900) |
1 |
(0018,9920), |
3\1 |
EQUAL |
"Top of Head" |
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(0018,9932) |
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Reference Basis Code |
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(0018,9902) |
1 |
(0018,9920), |
3\1 |
EQUAL |
(88986008, SCT, |
Sequence |
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(0018,9932) |
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"Vertex of Head") |
Reference Geometry |
|
(0018,9903) |
1 |
(0018,9920), |
3\1 |
EQUAL |
(128120, DCM, |
Code Sequence |
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(0018,9932) |
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"Plane through |
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Superior Extent") |
>CT X-Ray Details Sequence (0018,9325) - First Beam |
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Beam Number |
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(300A,00C0) |
1 |
(0018,9920), |
3\1 |
EQUAL |
1 |
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(0018,9325) |
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KVP |
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(0018,0060) |
1 |
(0018,9920), |
3\1 |
EQUAL |
120 |
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(0018,9325) |
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X-rayTubeCurrentinmA |
(0018,9330) |
1 |
(0018,9920), |
3\1 |
EQUAL |
220 |
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(0018,9325) |
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Exposure Modulation |
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(0018,9323) |
1 |
(0018,9920), |
3\1 |
EQUAL |
NONE |
Type |
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(0018,9325) |
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Data Collection Diameter |
(0018,0090) |
1 |
(0018,9920), |
3\1 |
EQUAL |
240 |
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(0018,9325) |
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- Standard -
Page 802 DICOM PS3.17 2020a - Explanatory Information
Table AAAA.2-3e. First Reconstruction Protocol Element Specification
Attribute |
SelectorAttributeSelectorSelector Sequence Selector |
Constraint |
Constraint Value |
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Value |
Pointer |
Sequence |
Type |
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Number |
|
Pointer |
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Items |
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Reconstruction Protocol Element Sequence (yym8, m9x1) |
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Protocol Element Name |
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(0018,9922) |
1 |
(0018,9934) |
1 |
EQUAL |
"Transverse" |
Requested Series |
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(0018,9937) |
1 |
(0018,9934) |
1 |
EQUAL |
"Transverse without |
Description |
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|
Contrast" |
Source Acquisition |
|
(0018,9938) |
1 |
(0018,9934) |
1 |
EQUAL |
3 |
ProtocolElementNumber |
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Source Acquisition Beam |
(0018,9939) |
1 |
(0018,9934) |
1 |
EQUAL |
1 |
|
Number |
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ConvolutionKernelGroup |
(0018,9316) |
1 |
(0018,9934) |
1 |
EQUAL |
"BRAIN" |
|
Reconstruction Diameter |
(0018,1100) |
1 |
(0018,9934) |
1 |
EQUAL |
240 |
|
Rows |
|
(0028,0010) |
1 |
(0018,9934) |
1 |
EQUAL |
512 |
Columns |
|
(0028,0011) |
1 |
(0018,9934) |
1 |
EQUAL |
512 |
Slice Thickness |
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(0018,0050) |
1 |
(0018,9934) |
1 |
EQUAL |
5 |
Spacing Between Slices |
(0018,0088) |
1 |
(0018,9934) |
1 |
EQUAL |
5 |
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>Reconstruction Algorithm Sequence (0018,993D) |
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Algorithm Name |
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(0066,0036) |
1 |
(0018,9934) |
1/1 |
EQUAL |
"Opti-Brain" |
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(0018,993D) |
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Algorithm Name Code |
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(0066,0030) |
1 |
(0018,9934) |
1/1 |
EQUAL |
(B506, 99ACME, |
Sequence |
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(0018,993D) |
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"OptiBrain") |
>Reconstruction Start Location Sequence (0018,993B) |
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ReferenceLocationLabel |
(0018,9900) |
1 |
(0018,9934), |
1\1 |
EQUAL |
"Bottom of Scan" |
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(0018,993B) |
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Reference Basis Code |
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(0018,9902) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(128160, DCM, |
Sequence |
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(0018,993B) |
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"Acquired Volume") |
Reference Geometry |
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(0018,9903) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(128121, DCM, |
Code Sequence |
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(0018,993B) |
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"Plane through |
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Inferior Extent") |
>Reconstruction End Location Sequence (0018,993C) |
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ReferenceLocationLabel |
(0018,9900) |
1 |
(0018,9934), |
1\1 |
EQUAL |
"Top of Scan" |
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(0018,993C) |
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Reference Basis Code |
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(0018,9902) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(128160, DCM, |
Sequence |
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(0018,993C) |
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"Acquired Volume") |
Reference Geometry |
|
(0018,9903) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(128120, DCM, |
Code Sequence |
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(0018,993C) |
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"Plane through |
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Superior Extent") |
Table AAAA.2-3f. Second Reconstruction Protocol Element Specification
Attribute |
SelectorAttributeSelectorSelector Sequence Selector |
Constraint |
Constraint Value |
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Value |
Pointer |
Sequence |
Type |
|
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|
Number |
|
Pointer |
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Items |
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Reconstruction Protocol Element Sequence (yym8, m9x1) |
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Protocol Element Name |
(0018,9922) |
1 |
(0018,9934) |
2 |
EQUAL |
"Volume" |
- Standard -
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DICOM PS3.17 2020a - Explanatory Information |
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Page 803 |
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Attribute |
SelectorAttributeSelectorSelector Sequence Selector |
Constraint |
Constraint Value |
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Value |
Pointer |
Sequence |
Type |
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Number |
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Pointer |
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Items |
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ProtocolElementPurpose |
(0018,9924) |
1 |
(0018,9934) |
2 |
EQUAL |
"For volume |
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processing" |
Protocol Element |
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(0018,9923) |
1 |
(0018,9934) |
2 |
EQUAL |
"Thin slices" |
Characteristics Summary |
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Requested Series |
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(0018,9937) |
1 |
(0018,9934) |
1 |
EQUAL |
"Brain Volume" |
Description |
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Source Acquisition |
|
(0018,9938) |
1 |
(0018,9934) |
2 |
EQUAL |
3 |
Protocol Element Number |
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Source Acquisition Beam |
(0018,9939) |
1 |
(0018,9934) |
2 |
EQUAL |
1 |
|
Number |
|
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Convolution Kernel Group |
(0018,9316) |
1 |
(0018,9934) |
2 |
EQUAL |
"BRAIN" |
|
Reconstruction Diameter |
(0018,1100) |
1 |
(0018,9934) |
2 |
EQUAL |
240 |
|
Rows |
|
(0028,0010) |
1 |
(0018,9934) |
2 |
EQUAL |
512 |
Columns |
|
(0028,0011) |
1 |
(0018,9934) |
2 |
EQUAL |
512 |
Slice Thickness |
|
(0018,0050) |
1 |
(0018,9934) |
2 |
EQUAL |
0.5 |
Spacing Between Slices |
|
(0018,0088) |
1 |
(0018,9934) |
2 |
EQUAL |
0.25 |
>Reconstruction Algorithm Sequence (0018,993D) |
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Algorithm Name |
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(0066,0036) |
1 |
(0018,9934) |
2/1 |
EQUAL |
"Opti-Brain" |
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(0018,993D) |
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|
Algorithm Name Code |
|
(0066,0030) |
1 |
(0018,9934) |
2/1 |
EQUAL |
(B506, 99ACME, |
Sequence |
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(0018,993D) |
|
|
"OptiBrain") |
>Reconstruction Start Location Sequence (0018,993B) |
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Reference Location Label |
(0018,9900) |
1 |
(0018,9934), |
2\1 |
EQUAL |
"Bottom of Scan" |
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(0018,993B) |
|
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|
Reference Basis Code |
|
(0018,9902) |
1 |
(0018,9934), |
2\1 |
EQUAL |
(128160, DCM, |
Sequence |
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|
(0018,993B) |
|
|
"Acquired Volume") |
ReferenceGeometryCode |
(0018,9903) |
1 |
(0018,9934), |
2\1 |
EQUAL |
(128121, DCM, |
|
Sequence |
|
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(0018,993B) |
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"Plane through |
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|
Inferior Extent") |
>Reconstruction End Location Sequence (0018,993C) |
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Reference Location Label |
(0018,9900) |
1 |
(0018,9934), |
2\1 |
EQUAL |
"Top of Scan" |
|
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|
(0018,993C) |
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|
Reference Basis Code |
|
(0018,9902) |
1 |
(0018,9934), |
2\1 |
EQUAL |
(128160, DCM, |
Sequence |
|
|
|
(0018,993C) |
|
|
"Acquired Volume") |
ReferenceGeometryCode |
(0018,9903) |
1 |
(0018,9934), |
2\1 |
EQUAL |
(128120, DCM, |
|
Sequence |
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|
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(0018,993C) |
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"Plane through |
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Superior Extent") |
Table AAAA.2-3g. First Storage Protocol Element Specification |
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Attribute |
|
Selector |
Selector Selector Sequence Selector |
Constraint Constraint Value |
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Attribute |
Value |
Pointer |
Sequence |
Type |
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|
Number |
|
PointerItems |
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Storage Protocol Element Sequence (0018,9936) |
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Protocol Element Name |
|
(0018,9922) |
1 |
(0018,9936) |
1 |
EQUAL |
"To PACS" |
- Standard -
Page 804 |
DICOM PS3.17 2020a - Explanatory Information |
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Attribute |
Selector |
Selector Selector Sequence |
Selector |
Constraint Constraint Value |
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Attribute |
Value |
Pointer |
Sequence |
Type |
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|
Number |
PointerItems |
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|
ProtocolElementPurpose |
(0018,9924) |
1 |
(0018,9936) |
1 |
EQUAL |
"For reading" |
Protocol Element |
(0018,9923) |
1 |
(0018,9936) |
1 |
EQUAL |
"Localizers, |
Characteristics Summary |
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|
transverseandthin |
|
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|
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|
images" |
Source Acquisition |
(0018,9938) |
1 |
(0018,9936) |
1 |
EQUAL |
1\2 |
ProtocolElementNumber |
|
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|
|
|
|
Source Reconstruction |
(0018,993A) |
1 |
(0018,9936) |
1 |
EQUAL |
1\2 |
ProtocolElementNumber |
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>Output Information Sequence (0040,4033) |
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>>DICOM Retrieval Sequence (0040,4071) |
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Destination AE |
(2100,0140) |
1 |
(0018,9936), |
1\1\1 |
EQUAL |
"MHPACS" |
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(0040,4033), |
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(0040,4071) |
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Table AAAA.2-3h. Second Storage Protocol Element Specification |
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Attribute |
Selector |
Selector Selector Sequence |
Selector |
Constraint Constraint |
||
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Attribute |
Value |
Pointer |
Sequence |
Type |
Value |
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|
Number |
Pointer Items |
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||
Storage Protocol Element Sequence (0018,9936) |
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|
|
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Protocol Element Name |
(0018,9922) |
1 |
(0018,9936) |
2 |
EQUAL |
"To 3D" |
Protocol Element |
(0018,9924) |
1 |
(0018,9936) |
2 |
EQUAL |
"For 3D |
Purpose |
|
|
|
|
|
Processing" |
Protocol Element |
(0018,9923) |
1 |
(0018,9936) |
2 |
EQUAL |
"Thin images" |
CharacteristicsSummary |
|
|
|
|
|
|
Source Reconstruction |
(0018,993A) |
1 |
(0018,9936) |
2 |
EQUAL |
2 |
Protocol Element |
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|
|
|
|
Number |
|
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>Output Information Sequence (0040,4033) |
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>>DICOM Retrieval Sequence (0040,4071) |
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|
|
|
|
DestinationAE |
(2100,0140) |
1 |
(0018,9936), |
2\1\1 |
EQUAL |
"3DWS" |
|
|
|
(0040,4033), |
|
|
|
|
|
|
(0040,4071) |
|
|
|
Table AAAA.2-3i. Third Storage Protocol Element Specification |
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Attribute |
Selector |
Selector Selector Sequence |
Selector |
Constraint Constraint Value |
||
|
Attribute |
Value |
Pointer |
Sequence |
Type |
|
|
|
Number |
Pointer Items |
|
|
|
Storage Protocol Element Sequence (0018,9936) |
|
|
|
|
||
Protocol Element Name |
(0018,9922) |
1 |
(0018,9936) |
3 |
EQUAL |
"Raw Data |
|
|
|
|
|
|
Archive" |
Protocol Element |
(0018,9924) |
1 |
(0018,9936) |
3 |
EQUAL |
"For later recons" |
Purpose |
|
|
|
|
|
|
Protocol Element |
(0018,9923) |
1 |
(0018,9936) |
3 |
EQUAL |
"Raw acq data" |
Characteristics |
|
|
|
|
|
|
Summary |
|
|
|
|
|
|
- Standard -
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DICOM PS3.17 2020a - Explanatory Information |
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Page 805 |
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Attribute |
Selector |
Selector Selector Sequence |
Selector |
Constraint Constraint Value |
||
|
Attribute |
Value |
Pointer |
Sequence |
Type |
|
|
|
Number |
Pointer Items |
|
|
|
Source Acquisition |
(0018,9938) |
1 |
(0018,9936) |
3 |
EQUAL |
3 |
Protocol Element |
|
|
|
|
|
|
Number |
|
|
|
|
|
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>Output Information Sequence (0040,4033) |
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|
|
|
||
>>DICOM Retrieval Sequence (0040,4071) |
|
|
|
|
|
|
DestinationAE |
(2100,0140) |
1 |
(0018,9936), |
3\1\1 |
EQUAL |
"RAWCACHE" |
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(0040,4033), |
|
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|
|
|
|
(0040,4071) |
|
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|
AAAA.3 CT Protocol For Tumor Volumetric Measurements
This section includes a Defined Protocol examples of a CT Protocol for Tumor Volumetric Measurements for a clinical trial. These examples are intended to illustrate the encoding mechanisms of the DICOM CT Protocol Storage IODs, not to suggest particular values for clinical trials. Although the examples in this section were originally inspired by protocol documents previously published by ACRIN, some values here were modified and are likely out of date. Parties interested in the current ACRIN protocols are encouraged to visit https://www.acrin.org/
AAAA.3.1 Common Context
Table AAAA.3-1 is basically the same for each model so it is shown here rather than duplicating it. The second half is then shown below in Table AAAA.3-2.
Table AAAA.3-1. CT Tumor Volumetric Measurement - Context
Attribute |
Tag |
|
Value |
Clinical Trial Sponsor Name |
|
(0012,0010) |
Deckard Pharmaceuticals |
Clinical Trial Protocol ID |
|
(0012,0020) |
6678 |
Clinical Trial Protocol Name |
|
(0012,0021) |
DP6678 Phase III |
Clinical Trial Site ID |
|
(0012,0030) |
"" |
Clinical Trial Site Name |
|
(0012,0031) |
"" |
Clinical Trial Coordinating |
(0012,0060) |
Tyrell Core Labs |
|
Center Name |
|
|
|
Responsible Group Code Sequence |
|
(0008,0220) |
"" |
Equipment Modality |
|
(0008,0221) |
CT |
Protocol Name |
|
(0018,1030) |
CT Tumor Volumetric Measurement |
PotentialScheduledProtocolCodeSequence |
(0018,9906) |
(6678-1, 99DP, "DP6678 Phase III CT Protocol") |
|
Potential Requested Procedure Code |
|
(0018,9907) |
(72253-8, LN, "CT CAP WO contrast") |
Sequence |
|
|
|
Potential Reasons for Procedure |
|
(0018,9908) |
Metastatic non-small cell lung cancer\tumor volumetric |
|
|
|
measurements |
Contraindications Code Sequence |
|
(0018,990B) |
(77386006, SCT, "Patient currently pregnant") |
Content Creator's Name |
|
(0070,0084) |
Jane Investigator |
- Standard -
Page 806 |
DICOM PS3.17 2020a - Explanatory Information |
||
Attribute |
|
Tag |
Value |
Protocol Design Rationale |
|
(0018,9910) |
See DP6678 Phase III Protocol documents: |
|
|
|
http://ctrialdocs.tyrell.co.ca/DP6678_protocol.aspx. |
|
|
|
Inparticular,seediscussioninSection3(CTAcquisition |
|
|
|
Parameters and Image Data Analysis) of the Protocol |
|
|
|
Document: |
|
|
|
The Spacing Between Slices may be increased as long |
|
|
|
as the overlap between slices is maintained between |
|
|
|
0% and 20% overlap. |
|
|
|
The Slice Thickness may be increased up to 1.5mm as |
|
|
|
long as the Spacing Between Slices is correspondingly |
|
|
|
increased to maintain between 0% and 20% overlap. |
Protocol Planning Information |
|
(0018,990F) |
Use of intravenous contrast media, presence of motion |
|
|
|
artifacts or violation of slice width, slice interval or voxel |
|
|
|
size constraints will disqualify the CT scan series. |
Instance Creation Date |
|
(0008,0012) |
20150607 |
Instance Creation Time |
|
(0008,0013) |
115623 |
Patient Specification Sequence |
|
(0018,9911) |
|
Instruction Sequence |
|
(0018,9914) |
|
>Instruction Index |
|
(0018,9915) |
1 |
>Instruction Text |
|
(0018,9916) |
"Scan the chest in full inspiration" |
>Instruction Index |
|
(0018,9915) |
2 |
>Instruction Text |
|
(0018,9916) |
"Set reconstruction diameter to span from outer rib to |
|
|
|
outer rib" |
Patient Positioning Instruction Sequence |
(0018,991B) |
|
|
>Instruction Index |
|
(0018,9915) |
1 |
>Instruction Text |
|
(0018,9916) |
"Position arms above the head." |
Anatomic Region Sequence |
|
(0008,2218) |
(51185008, SCT, "Chest") |
Primary Anatomic Structure Sequence |
|
(0008,2228) |
(310787001, SCT, "Lung and Mediastinum") |
AAAA.3.2 Acme
The first part of this example is shown above in Table AAAA.3-2.
The anatomical extent is defined in the reconstruction to represent the dataset of interest to the clinical trial. The extent was not defined in the localizer or acquisition. Sites are welcome to reflect their local practice in the localizer and acquisition extent as long as they permit production of the reconstruction as specified here.
Table AAAA.3-2. CT Tumor Volumetric Measurement - Details - Acme
Attribute |
Tag |
Value |
Model Specification Sequence |
(0018,9912) |
|
>Manufacturer |
(0008,0070) |
ACME |
>Manufacturer's Related Model Group |
(0008,0222) |
Ultimate |
>Software Versions |
(0018,1020) |
V3.1 |
Acquisition Protocol Element Specification Sequence |
(0018,991F) |
|
>Protocol Element Number |
(0018,9921) |
1 |
>Parameters Specification Sequence |
(0018,9913) |
|
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Page 807 |
|
Attribute |
Tag |
Value |
>>See Table AAAA.3-2a First Acquisition Protocol Element Specification |
|
|
>Protocol Element Number |
(0018,9921) |
2 |
>Parameters Specification Sequence |
(0018,9913) |
|
>>See Table AAAA.3-2b “Second Acquisition Protocol Element Specification” |
|
|
Reconstruction Protocol Element Specification Sequence |
(0018,9933) |
|
>Protocol Element Number |
(0018,9921) |
1 |
>Parameters Specification Sequence |
(0018,9913) |
|
>>See Table AAAA.3-2c “First Reconstruction Protocol Element Specification”
The following tables reflect the semantic contents of constraint sequences but not the actual structure of the IOD. The centered rows in italics clarify the context of the constrained Attributes that follow by indicating which sequence in the performed module contains the constrained Attribute (as specified in the Selector Sequence Pointer).
Table AAAA.3-2a. First Acquisition Protocol Element Specification
Attribute |
SelectorAttributeSelector |
Selector Sequence |
Selector |
Constraint |
Constraint Value |
||
|
|
|
Value |
Pointer |
Sequence |
Type |
|
|
|
|
Number |
PointerItems |
|
|
|
Acquisition Protocol Element Sequence (0018,9920) |
|
|
|
|
|||
Protocol Element |
|
(0018,9922) |
1 |
(0018,9920) |
1 |
EQUAL |
Localizer: Lateral |
Name |
|
|
|
|
|
|
|
Acquisition Type |
|
(0018,9302) |
1 |
(0018,9920) |
1 |
EQUAL |
CONSTANT_ANGLE |
Tube Angle |
|
(0018,9303) |
1 |
(0018,9920) |
1 |
EQUAL |
90 |
Acquisition Motion |
|
(0018,9930) |
1 |
(0018,9920) |
1 |
EQUAL |
FORWARD |
>CT X-Ray Details Sequence (0018,9325) - First Beam |
|
|
|
||||
Beam Number |
|
(300A,00C0) |
1 |
(0018,9920), |
1\1 |
EQUAL |
1 |
|
|
|
|
(0018,9325) |
|
|
|
KVP |
|
(0018,0060) |
1 |
(0018,9920), |
1\1 |
EQUAL |
120 |
|
|
|
|
(0018,9325) |
|
|
|
X-ray Tube Current |
(0018,9330) |
1 |
(0018,9920), |
1\1 |
EQUAL |
50 |
|
in mA |
|
|
|
(0018,9325) |
|
|
|
Table AAAA.3-2b. Second Acquisition Protocol Element Specification
Attribute |
Selector AttributeSelector |
Selector Sequence |
Selector ConstraintType Constraint |
||||
|
|
|
Value |
Pointer |
Sequence |
|
Value |
|
|
|
Number |
|
Pointer |
|
|
|
|
|
|
|
Items |
|
|
Acquisition Protocol Element Sequence (0018,9920) |
|
|
|
|
|||
ProtocolElementName |
(0018,9922) |
1 |
(0018,9920) |
2 |
EQUAL |
Helical |
|
Acquisition Type |
|
(0018,9302) |
1 |
(0018,9920) |
2 |
EQUAL |
SPIRAL |
Revolution Time |
|
(0018,9305) |
1 |
(0018,9920) |
2 |
EQUAL |
0.5 |
Single Collimation |
|
(0018,9306) |
1 |
(0018,9920) |
2 |
EQUAL |
0.75 |
Width |
|
|
|
|
|
|
|
Total Collimation Width |
(0018,9307) |
1 |
(0018,9920) |
2 |
EQUAL |
48 |
|
Table Speed |
|
(0018,9309) |
1 |
(0018,9920) |
2 |
EQUAL |
27 |
>CT X-Ray Details Sequence (0018,9325) - First Beam
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|
DICOM PS3.17 2020a - Explanatory Information |
|
|
|
|||
Attribute |
Selector AttributeSelector |
Selector Sequence Selector ConstraintType Constraint |
||||||
|
|
|
Value |
Pointer |
Sequence |
|
Value |
|
|
|
|
Number |
|
Pointer |
|
|
|
|
|
|
|
|
Items |
|
|
|
Beam Number |
(300A,00C0) |
1 |
(0018,9920), |
2\1 |
EQUAL |
1 |
||
|
|
|
|
(0018,9325) |
|
|
|
|
KVP |
(0018,0060) |
1 |
(0018,9920), |
2\1 |
EQUAL |
120 |
||
|
|
|
|
(0018,9325) |
|
|
|
|
Exposure in mAs |
(0018,9332) |
1 |
(0018,9920), |
2\1 |
RANGE_INCL100, 260 |
|||
|
|
|
|
(0018,9325) |
|
|
|
|
Respiratory Motion |
(0018,9170) |
1 |
(0018,9920), |
2\1 |
EQUAL |
BREATH_HOLD |
||
Compensation |
|
|
|
(0018,9325) |
|
|
|
|
Technique |
|
|
|
|
|
|
|
|
Table AAAA.3-2c. First Reconstruction Protocol Element Specification |
|
|||||||
Attribute |
|
Selector |
SelectorSelector Sequence Selector |
Constraint |
Constraint Value |
|||
|
|
Attribute |
Value |
Pointer |
Sequence |
Type |
|
|
|
|
|
Number |
|
Pointer |
|
|
|
|
|
|
|
|
Items |
|
|
|
Reconstruction Protocol Element Sequence (yym8, m9x1) |
|
|
|
|
||||
Protocol Element Name |
(0018,9922) |
1 |
(0018,9934) |
1 |
EQUAL |
"Transverse" |
||
Source Acquisition |
|
(0018,9938) |
1 |
(0018,9934) |
1 |
EQUAL |
2 |
|
ProtocolElementNumber |
|
|
|
|
|
|
|
|
Source Acquisition Beam |
(0018,9939) |
1 |
(0018,9934) |
1 |
EQUAL |
1 |
|
|
Number |
|
|
|
|
|
|
|
|
Reconstruction Algorithm |
(0018,9315) |
1 |
(0018,9934) |
1 |
EQUAL FILTER_BACK_PROJ |
|||
Convolution Kernel |
|
(0018,1210) |
1 |
(0018,9934) |
1 |
EQUAL |
"B1" |
|
ConvolutionKernelGroup |
(0018,9316) |
1 |
(0018,9934) |
1 |
EQUAL |
"LUNG" |
||
Reconstruction Pixel |
|
(0018,9322) |
1 |
(0018,9934) |
1 RANGE_INCL0.55, 0.75 |
|||
Spacing |
|
|
|
|
|
|
|
|
Slice Thickness |
|
(0018,0050) |
1 |
(0018,9934) |
1 |
EQUAL |
1.0 |
|
Spacing Between Slices |
(0018,0088) |
1 |
(0018,9934) |
1 |
EQUAL |
1.0 |
|
|
>Reconstruction Start Location Sequence (0018,993B) |
|
|
|
|
|
|||
Reference Location Label |
(0018,9900) |
1 |
(0018,9934), |
1\1 |
EQUAL |
"Top of Shoulders" |
||
|
|
|
|
(0018,993B) |
|
|
|
|
Reference Basis Code |
(0018,9902) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(16982005, SCT, |
||
Sequence |
|
|
|
(0018,993B) |
|
|
"Shoulder region |
|
|
|
|
|
|
|
|
structure") |
|
Reference Geometry |
|
(0018,9903) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(128120,DCM,"Plane |
|
Code Sequence |
|
|
|
(0018,993B) |
|
|
through Superior |
|
|
|
|
|
|
|
|
Extent") |
|
>Reconstruction End Location Sequence (0018,993C) |
|
|
|
|
|
|||
Reference Location Label |
(0018,9900) |
1 |
(0018,9934), |
1\1 |
EQUAL |
"Mid-liver" |
||
|
|
|
|
(0018,993C) |
|
|
|
|
Reference Basis Code |
(0018,9902) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(10200004, SCT, |
||
Sequence |
|
|
|
(0018,993C) |
|
|
"Liver") |
|
Reference Geometry |
|
(0018,9903) |
1 |
(0018,9934), |
1\1 |
EQUAL |
(128130,DCM,"Plane |
|
Code Sequence |
|
|
|
(0018,993C) |
|
|
through Center") |
|
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DICOM PS3.17 2020a - Explanatory Information |
Page 809 |
BBBBColorinformationforParametricObject (Informative)
BBBB.1 Introduction
Functional imaging can create Parametric Maps showing a functional relation between the anatomical region and the specific func- tional activity. For display purposes it is useful to show this functional activity with the use of a color LUT on the related anatomical image. To be able to do this it is necessary to include a Palette Color Lookup Table for the Parametric Map and define how to map the (floating point) values to a specific RGB value.
For a correct mapping it is important to know what range of continuous values needs to be mapped to the discrete range of RGB values of the LUT. For this the Minimum Stored Value Mapped (0028,1231) and the Maximum Stored Value Mapped (0028,1232) are defined. All values between the minimum and maximum will be distributed in a linear manner to the Palette Color Lookup Table that is supplied.
The usage of floating point values for the stored values removes the need for a Real World Value transformation other than the identity transformation.
This example illustrates BOLD fMRI activation data for a bipolar motor paradigm stored as a floating point parametric map encoding ‘t’ (statistical) Real World Values. Each voxel’s value represents how well the BOLD time series information at that location of the brain fits the general linear model (GLM) of the fMRI block paradigm pattern (right or left versus control, no movement). Right and left have been encoded as positive and negative t values, respectively.
TheDoubleFloatMinimumStoredValueMappedandMaximumStoredValueMappedinthiscaseare-16.739and21.434,respectively. This range will be mapped to the low and high ends of the LUT applied to this activation map. In this case the Minimum Stored Value Mapped and Maximum Stored Value Mapped are equal to the RWV Minimum and Maximum, respectively, in the activation map data. Note several compelling reasons for the range to be different from the RWV Minimum and RWV Maximum:
1.Centering the RWV zero value on some desired index of the LUT; e.g., choosing -21.434 to +21.434 to properly center RWV zero on the middle of the LUT (presumably to match the LUT design).
2.ChoosinganarrowerrangeofMinimumStoredValueMappedand/orMaximumStoredValueMapped(negativeand/orpositive), i.e., windowing, to maximize the dynamic range of the LUT for critical RWV range(s).
3.Specifying a predetermined Minimum Stored Value Mapped and Maximum Stored Value Mapped regardless of the actual RWV data, in order to have key RWV transitions match LUT color effects, e.g., generally accepted hyperperfusion and hypoperfusion transition points in cerebral blood flow (CBF) maps.
For the purpose of this example, the full RWV range of the activation map is appropriate to display with the full range of the Spring Color Palette.
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DICOM PS3.17 2020a - Explanatory Information |
Figure BBBB.1-1. Color Parametric Map on top of an anatomical image
Astheactivationmapwithoutthresholdsuggests,areasoutsidethebrainhavebeenmaskedoff.ThesewouldbecodedwithPadding values in the parametric map.
Thresholding (not part of the parametric map) will be applied for positive and/or negative ranges. Note that this operation does not change the color mapping (i.e., RWV x corresponds to LUT entry j) but only the opacity of voxels outside the range (forcing A=0 or transparent).
Figure BBBB.1-2. Color Parametric Map with threshold applied on top of an anatomical image
Other visualization methods such as smoothing and overall opacity may be applied to the colored, thresholded activation map.
BBBB.2 Encoding Example
This section illustrates the usage of the Color LUT in the context of a Parametric Map IOD with the Palette Color Lookup Table for the example described.
Table BBBB.2-1. Example data for the Floating Point Image Pixel Module
Attribute |
Tag |
Value |
Comment |
Samples per Pixel |
(0028,0002) |
1 |
|
Photometric Interpretation |
(0028,0004) |
COLOR_RANGE |
|
Rows |
(0028,0010) |
41 |
|
- Standard -